Julius c



' (Mode1.) I

J. O. RICHARDSON.

WELDING FURNACE FOR HEATING BLANKS. No. 368,171.

3 am, f2.

Ilirsn dramas Parana rrrcn.

WELDlNG FURNACE FOR HEATING BLANKS.

SPECIFICATION forming part of Letters Patent No. 363,171, dated May 17, 1887.

Application filed September 4, 1886. Serial No. 212,727. (Modeh) T 0 all whom it may concern:

Be it known that I, JULIUS G. RICHARDSON, acitizen of the United States of America, residing at Ilion, in the county of Herkimer and State of New Yo.rk, have invented certain new and useful Improvements in IVelding-Furnaces and Natural-Gas Burners, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention pertains to certain new and useful improvements in gas weldingfurnaces for heating blanks, embodying an improved burner for natural gas, whereby the gas and air are thoroughly intermingled or mixed before being ignited; and it consists in the detailed construction, combination, and arrangement of the parts, substantially as hereinafter fully set forth, and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 is a sectional elevation of a furnace embodying my invention, and Fig. 2 is a side View thereof. Fig. 3 is a detail view of the burner.

In carrying out my invention I construct, preferably of brick, furnace A, of any suitable formation, and in the lower front portion thereof I form the combustionchamber a, near the lower end of the opposite sides of which are openings or apertures a,the purpose of which will appear further on. The comhusti0n-cha1nber at its upper end on either side opens into two opposite vertical flues or passage-ways,B,which extend from said chamber upwardlyin a vertical line to near the top of said compartment, where the same are curved downwardly and open into an opening or chamber, 13, which, as will appear further on, is where the welding of thciron is effected. Two small lines or passage-ways, b I), are pro vided in the wall 1/ between said combustion and welding chambers, the purpose of which will hereinafter appear.

0 O are two oppositely-disposed burners, the same consisting ofan outer tube or pipe,D, the inner end of which is apertured, and the same is rigidly secured in the openings a of the combustion-chamber, and the outer end of said tube or pipe is con neetcd to one end of an internally-screw-threaded pipe-joint, d, the other end of which is opened. From the under side of this pipe-j oint projects a short pipe,d, for the passage of air to said tube or pipe D,

the purpose of which will soon appear. Se-

cured within the open end of said pipe-j oint (Z is a second smaller gas tube or pipe, E, which projects within and is incased by the outer larger tube or pipe, D, and said gas tube pro jects to within a short distance of the inner end of the pipe D. The inner end of said smaller tube or pipe is inclosed by asmall internally-screw-thrcadcd cap, 0, and said tube or pipe is perforated throughout its surface a short distance, as at e, the purpose of which will appear further on. Upon the extreme outer end of this gas-tube is secured a suitable plug, of ordinary construction, by means of which the admission or flow of the gas maybe regulated as may be desired. Within the larger pipe,D,is secured, a short distance from the end and near the smaller tube, a screen, 0 for the thorough mixing of the air and gas and preventing the flame from running backward in said pipe when the current of air ceases to flow or is stopped.

From the foregoing it will be seen that by turning the above reterredto plug gas will be admitted into the gas tube or pipe, and at the same time air will pass (or it may be forced) up through the vertical pipe (1 and into the larger pipe, D, and the gas, upon reaching the inner end of its tube or pipe, will pass out through the perforations and intermingle with the air in the pipe D, and the same thus become thoroughly intermingled, and pass through the screen in said larger pipe and out through the apertured end of the burner, at which point the same may be readily ignited by applying a light thereto.

By placing the two burners one opposite the other the flames will meet at about the center of the combustion-chamber, and, passing upwardly, a portion thereof will enter through the dues or passage-ways b b into the weldingchamber and the remainder through the flues B downwardly into said chamber. Thus it will be seen that heat is supplied to said chamber both from the bottom and top, and by placing within said chamber the iron or other metal to be acted upon the welding operation will be readily accomplished, as an intense heat is applied to the same both from above and below.

Heretofore in the use of natural gas in welding iron a great objection has been that the ICO heat produced is very dry and nearly totally void of moisture, hence causing oxidation of the metal being acted upon, whereas by myinvention a thoroughly-moist heat is obtained, and, the flux running freely to all parts of the metal, the oxidation thereof is thereby avoided.

I am aware that it is not new to construct the heating-chamber of a sheet-iron furnace withaperforated cover and floor so arranged relatively to the fire-chamber and flues that the fire and heated air shall enterthe chamber through these openings in the cover and floor; and, also, that burners for the commingling of air and gas are not, per se, new. paladvantage of the construction shown in my invention is that I provide means for the employment of natural gas in connection with a furnace having flues opening into the weldlug-chamber both from above audbelow, said burners being so constructed as to cause the intermingling of gas and air before ignition.

The princi- By this means a thoroughly-moist heat is obtained in the welding-chamber, causing the flux to run freely, and any oxidation of the metal is entirely avoided.

Having thus fully described my invention, What I claim, and desire to secure by Letters Patent, is-

The herein-described welding-furnace, comprising a combustion and welding chamber and flues opening into said welding-chamber from above-and below, in combination with the burners disposed in said combustion-chamber opposite each other, said burners consisting of an outer air-pipe surrounding a perforated gas-pipe for conveying air .and gas, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses. 1

JULIUS C. RICHARDSON. Witnessesr CRAWFORD MCDOWELL, W. B. CUSHING. 

